Aaro has a background field of Corporate Finance and Investments. Aaro lived and studied in Boston, United States, before returning back to Helsinki for work. He is the Fourth Gen of the Finnish family company Kemppi Group Oy, which owns Kemppi Oy, a 75-year-old welding machine manufacturer, Kemptron Oy, an EMS business and remains the main owner of publicly-traded company Kempower Oyj, which manufactures DC EV charges for cars and utility vehicles.